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  <section id="id1">
<h1>内核驱动支持的功能<a class="headerlink" href="#id1" title="Permalink to this heading"></a></h1>
<p>内核驱动是在 Ceph 核心代码之外独立开发的，正因为这样，在功能实现方面它有时候和 FUSE 驱动不一样。下面详细描述了各种 CephFS 功能在内核驱动的实现状态。</p>
<section id="id2">
<h2>内联数据<a class="headerlink" href="#id2" title="Permalink to this heading"></a></h2>
<p>内联数据是在 Firefly 版引进的。这个功能在 CephFS 主线上已经废弃了，
而且以后的内核版本上可能彻底删除。</p>
<p>Linux 内核客户端 &gt;= 3.19 时，在修改文件数据时，它会读出内联数据并把已有的内联数据转换成 RADOS 对象。当前， Linux 内核客户端不会把文件数据存储为内联数据。</p>
<p>详情见 <a class="reference external" href="../experimental-features">实验性功能</a> 。</p>
</section>
<section id="id3">
<h2>配额<a class="headerlink" href="#id3" title="Permalink to this heading"></a></h2>
<p>配额功能在 hammer 版首次引进，配额的磁盘格式在 Mimic 版更新了。 &gt;= 4.17 的
Linux 内核客户端可以支持新格式的配额。当前，没有 Linux 内核客户端支持旧格式的配额。</p>
<p>详情见 <a class="reference external" href="../quota">配额</a> 。</p>
</section>
<section id="ceph">
<h2>单个 Ceph 集群内多个文件系统<a class="headerlink" href="#ceph" title="Permalink to this heading"></a></h2>
<p>此功能在 Jewel 版引进了。 &gt;= 4.7 的 Linux 内核客户端能支持。</p>
<p>详情见 <a class="reference external" href="../experimental-features">实验性功能</a> 。</p>
</section>
<section id="id4">
<h2>多活元数据服务器<a class="headerlink" href="#id4" title="Permalink to this heading"></a></h2>
<p>此功能从 Luminous 版起就支持了。有多活 MDS 时建议用 &gt;= 4.14 的 Linux 内核客户端。</p>
</section>
<section id="id5">
<h2>快照<a class="headerlink" href="#id5" title="Permalink to this heading"></a></h2>
<p>此功能从 Mimic 版起就支持了。使用快照功能时建议用 &gt;= 4.17 的 Linux 内核客户端。</p>
</section>
</section>



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